Pinus halepensis regeneration after a wildfire in a semiarid environment: assessment using multitemporal Landsat images
Sergio M. Vicente-Serrano A C , Fernando Pérez-Cabello B and Teodoro Lasanta A
+ Author Affiliations
- Author Affiliations
A Instituto Pirenaico de Ecología, CSIC (Spanish Research Council), Campus de Aula Dei, PO Box 13034, E-50080 Zaragoza, Spain.
B Departamento de Geografía, Universidad de Zaragoza, C/Pedro Cerbuna 12, E-50009 Zaragoza, Spain.
C Corresponding author. Email: svicen@ipe.csic.es
International Journal of Wildland Fire 20(2) 195-208 https://doi.org/10.1071/WF08203
Submitted: 10 December 2008 Accepted: 8 July 2010 Published: 30 March 2011
Abstract
We studied the spatial and temporal patterns of forest regeneration using a 24-year time series of Landsat images and the normalised difference vegetation index (NDVI) in a homogeneous Pinus halepensis forest, 3000 ha of which were extensively burned in 1995. We demonstrated a progressive slow and linear recovery in NDVI values, based on Landsat images between 1997 and 2007. The forest tended to recover to pre-disturbance conditions, both with respect to the magnitude of the NDVI and in terms of the spatial pattern. We found that the spatial differences in the rates of NDVI recovery were not affected by the burn severity. Moreover, burn severity did not affect the rates of NDVI recovery after the fire. Although highly homogeneous P. halepensis regeneration was the dominant pattern in the study area (more than the 70% of the burn area showed positive and significant trends), some spatial differences in the magnitude of change were observed. The forest tended to recover the spatial pattern corresponding to pre-fire conditions, although it was difficult to establish whether terrain elevation or previous tree size and density were the main governing factors, given the strong relationship between them.
Additional keywords: Ebro Valley, Mediterranean, NDVI, resilience, Spain, vegetation recovery.
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